P21 5 inch Color Gauge Display — OBD & GPS Modes with Slope Meter and Alarm System

The P21 is a compact multi-function car display featuring a 5 inch color LCD that presents multiple driving parameters at a glance so you can stay focused on the road. It supports both OBD and GPS modes to retrieve accurate vehicle data across different vehicle types. An integrated slope meter function provides real-time angle and gradient readings for safer handling on inclines and uneven surfaces. Built-in alarm functions include overspeed alerts and low voltage warnings to alert you to critical conditions. For maintenance, the P21 offers advanced scanning tools that let you read and clear engine trouble codes directly from the display, helping avoid unnecessary trips to a mechanic.